Weight - Very lightweight. Egos can get a bit under 2lbs, but having a little weight is more comfortable in my opinion.
Accuracy - The field I play on is pretty small, but I can nail people that pop out with the first one or two balls. I was also able to pick off people from across the field in the snake with it as well.
Speed - This gun rips, it shoots pretty close to ball on ball and I only get around +- 4 Fps. It can do 25 ball full auto and ramping if your hopper is fast enough.
Stock barrel - 14 inch cocker threaded barrel.
Stock board - Ridiculous amount of modes for a stock board, and also has a standby feature built in to save battery life. Could use some more debouncing modes from what I've read but a virtue board is coming out for it(I haven't noticed my fusion bouncing).
Feedneck - Clamping feedneck, doesn't get much better.
Looks & Feels - Looks amazing, can't walk around without everyone asking what kind of gun it is. Looks sort of like a revised ego. It's a durable marker with all aluminum anodized parts.

Conclusion:

For 450, you're getting a product that can compete with other high end guns that cost much more. If you get this and have more skill than the opponent, them having a SL74 isn't going to significantly help him enough to beat you. When it comes down to it, skills mean more than clever marketing and that's what alot of paintball players don't realize.